// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_FILES_SCOPED_FILE_H_
#define BASE_FILES_SCOPED_FILE_H_

#include <stdio.h>

#include <memory>

#include "base/base_export.h"
#include "base/logging.h"
#include "base/scoped_generic.h"
#include "build/build_config.h"

namespace base {

namespace internal {

#if defined(OS_POSIX)
    struct BASE_EXPORT ScopedFDCloseTraits {
        static int InvalidValue()
        {
            return -1;
        }
        static void Free(int fd);
    };
#endif

    // Functor for |ScopedFILE| (below).
    struct ScopedFILECloser {
        inline void operator()(FILE* x) const
        {
            if (x)
                fclose(x);
        }
    };

} // namespace internal

// -----------------------------------------------------------------------------

#if defined(OS_POSIX)
// A low-level Posix file descriptor closer class. Use this when writing
// platform-specific code, especially that does non-file-like things with the
// FD (like sockets).
//
// If you're writing low-level Windows code, see base/win/scoped_handle.h
// which provides some additional functionality.
//
// If you're writing cross-platform code that deals with actual files, you
// should generally use base::File instead which can be constructed with a
// handle, and in addition to handling ownership, has convenient cross-platform
// file manipulation functions on it.
typedef ScopedGeneric<int, internal::ScopedFDCloseTraits> ScopedFD;
#endif

// Automatically closes |FILE*|s.
typedef std::unique_ptr<FILE, internal::ScopedFILECloser> ScopedFILE;

} // namespace base

#endif // BASE_FILES_SCOPED_FILE_H_
